John h



Patented Man. 4, 1884.

J. H. BINGHAM.

PRINTERS DAMPING ROLLER.

(No Model.)

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' WITNESSES UNITED STATES PATENT OFFICE.

JOHN H. BINGHAM, OF HARTFORD, CQNNEOTICUT,ASSIGN OR TO JOHN AND EDMUNDMOLOUGHLIN, OF NEW YORK, N. Y.

PRINTERS DAM PING-ROLLER.

SPECIFICATION forming part of Letters Patent No. 294,436, dated March 4,I884. Application filed July 25, 1883. (No model.)

T0 aZZ whom it may concern:

Be it known that I, JOHN H. BINGHAM, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain Improvements in PrintersDamping-Rollers, of which the following is a specification.

- My invention relates to that class of printers rollers Which areemployed for wetting the stone in lithographic printing, and for likepurposes.

In carrying out my invention I construct on the roller-stock a cushionof the ordinary roller compositionthat is to say, a com pound of glue orgelatine and some saccharine substance. This forms the ordinary printersinking-roller. I Over this roller I place a thin cover of rubber,preferably rubber vulcanized to about the degree usually seen in theordinary elastic rubber bands. Over this cover I place an exterior coverof felt to take up and distribute the Water. As

the roller composition from which the core is thin covering ofvulcanized rubber thereto to protect it from the moisture. In order tofurther protect the composition from both moisture and air, I prefer todraw the thin rubber covering down over the ends of the compositioncushion or core, and to secure it to the stock by a wrapping of threador wire. This forms a hermetic joint, and maintains the composition core.in its normal condition almost indefinitely. If air has access to thecomposition, it gradually removes the moisture therefrom and causes itto 'harden and crack, and if continually subjected to the action ofmoisture the composition is soon disintegrated and destroyed.

In the accompanying drawings, wherein my invention is illustrated,Figure 1 is asectional elevation of my improved roller-that is to say,the upper half is in elevation and the lower half in section through theaxis of the roller. Fig. 2 is a transverse section of the roller.

A represents the roller-stock, usually made from metal; B,thecomposition cushion or core; 0, the rubber covering for the same, andD the usual exterior covering of felt. When in place over the cushion B,the protecting cover of rubber is drawn down at the ends and secured tothe stock by a wrapping, a, of

By this construction I am enabled.

cheap composition ordinarily employed for applyingink, as the rubberOserves to fully protect it from the baleful influences of both air andwater. I The rubbercovering need not of necessity be very thin but athin covering serves my purpose quite as well as a thick one, and ismuch less expensive. This covering may be made in tubular form, and thendrawn over the composition core previously molded on the stock.

Having thus described my invention, I claim- L 1. Awetting-roller forprinters, comprising a core or cushion of the ordinary rollercomposition formed or molded on the stock, an exterior felt covering toform the roller-face, and a covering of rubber interposed between saidfelt and composition to prevent the water from getting at and injuringthe composition core, substantially as herein shown and described. I

2. Awetting-roller for printers, comprising a stock, a core orcushion-of the ordinary .roller composition molded or formed on thestock, a protective covering of rubber placed over said composition coreand drawn down and secured to the stock, so as to protect the ends ofsaid core, as shown, and an-exterior covering of felt, all arrangedsubstantially as set forth. 7 Y X In witness whereof I have hereuntosigned my name in the presence of two subscribing witnesses.

J OHN H. BINGHAM. Witnesses: WM. KNOX, A. CAMPBELL.

